CN114745996A

CN114745996A - Vacuum cleaner with a vacuum cleaner head

Info

Publication number: CN114745996A
Application number: CN202080082496.5A
Authority: CN
Inventors: 李钟明; 金治完; 赵真来; 李定禹
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2019-12-03
Filing date: 2020-12-01
Publication date: 2022-07-12
Anticipated expiration: 2040-12-01
Also published as: AU2020396012B2; CN114745996B; EP4070705B1; US20230355054A1; AU2020396012A1; EP4070705A4; EP4070705A1; WO2021112528A1; KR20210069405A

Abstract

A vacuum cleaner is disclosed. The vacuum cleaner of the present invention includes a body and a suction nozzle. The suction nozzle includes a housing and a rotating brush. The rotating brush includes a first rotating brush, a second rotating brush, and a coupling. The coupling couples the first rotating brush and the second rotating brush such that the rotation axes of the first rotating brush and the second rotating brush are located on the same line.

Description

Vacuum cleaner with a vacuum cleaner head

Technical Field

The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner capable of cleaning dust on a smooth floor surface by a rotating brush.

Background

Vacuum cleaners have different sweeping capabilities depending on the type of brush mounted thereto.

On uneven carpets, brushes for carpets made of hard plastic materials are advantageous in terms of cleaning efficiency.

On the other hand, a brush for a floor made of soft pile is advantageous in cleaning efficiency on a smooth floor such as a floor or a floor leather.

If the brush for floor made of velvet material is used, the scratch of the floor caused by the brush can be prevented. In addition, if the brush made of the velvet material is rotated at a high speed, fine dust attached to the ground can be sucked and removed after floating.

In connection with this, korean laid-open patent publication No. 2019-0080855 (hereinafter, "prior document 1") discloses a vacuum cleaner. The vacuum cleaner of prior document 1 includes a cleaner body and a suction nozzle. The suction nozzle includes a housing, a rotary cleaning part, a driving part, and a rotary support part.

The rotary cleaning part comprises a nozzle main body, a fiber layer, fiber wool and metal wool. The fiber layer is formed to surround the outer peripheral surface of the spout body. The fiber wool and the metal wool are implanted into the fiber layer.

The part implanted with the fiber hairs and the metal hairs may be divided into a strap (strap) part and an anti-static part. The strip portions are made of fiber wool. No metal wool is implanted in the strip portion. The antistatic part is composed of fiber wool and metal wool. An antistatic section is disposed between the band sections.

The implanted fiber hairs and the metal hairs form lines along one direction above the fiber layer. That is, the implanted fiber hairs and the implanted metal hairs are implanted obliquely in one direction. The implanted fiber hairs and metal hairs are textured in the longitudinal direction of the strap portion (or the antistatic portion).

The band portion and the static electricity preventing portion may extend in a length direction of the nozzle body. In addition, the band portion and the static electricity preventing portion may extend in a circumferential direction of the nozzle body. In addition, the band portion and the static electricity preventing portion extend in a spiral direction of the nozzle body.

The rotary cleaning part is a structure that a plurality of hairs scrape the ground to move the dust backward. Impurities such as hair and dust can be easily attached between the bristles of the rotary cleaning part.

However, in the case where the band portion and the static electricity preventing portion extend in the spiral direction of the nozzle body, there is a problem that foreign substances such as hair, dust, and the like are caught at the tip end portion of the rotary cleaning portion.

During the rotation of the rotary cleaning part, the plurality of hairs periodically contact the ground and repeatedly bend and unfold. In this process, the foreign substances such as hair and dust move in one direction of the rotary cleaning part.

A rotation supporting part and a driving part are arranged at the end part of the rotation cleaning part. The foreign substances such as hair, dust, etc. moved to the end portion of the rotary cleaning part may be sandwiched between the rotary support part and the main body or between the rotary support part and the side cover. Therefore, the rotation of the rotary cleaning unit becomes increasingly difficult.

On the other hand, in the case where the band portion and the static electricity preventing portion extend in the longitudinal direction of the nozzle body, there is a problem that foreign substances such as hair and dust are accumulated in a specific region of the rotary cleaning portion. The specific region may refer to the middle of the rotary cleaning part. The specific region may be a tip portion of the rotary cleaning part.

The manufacturing process of the rotary cleaning part is as follows. First, fiber wool and metal wool are implanted into a fiber layer. Next, a fiber layer is attached to the outer surface of the body. In order to solve the problems as described above, the applicant of the present invention has tried to attach a plurality of fiber layers implanted with textures different from each other to the outer surface of the body.

However, it is not easy to precisely attach the plurality of fiber layers to each specific region of the outer surface of the main body. If the fiber layers are not exactly attached to a specific region of the outer surface of the main body, the fiber layers may be spaced apart from each other, or portions of the fiber layers may overlap each other.

Disclosure of Invention

Problems to be solved by the invention

An object of the present invention is to provide a vacuum cleaner in which foreign substances such as hair and dust attached to a rotary brush are not moved to a distal end of the rotary brush and are caught or gathered in a specific portion.

An object of the present invention is to provide a vacuum cleaner in which brush members are provided on an outer surface of a rotating brush so as not to have portions spaced apart from or overlapping each other.

An object of the present invention is to provide a vacuum cleaner in which a rotary brush can be quickly manufactured even when brush members having different patterns are attached to an outer surface of a main body.

Technical scheme for solving problems

In the vacuum cleaner according to an embodiment of the present invention, the coupling may couple the first rotating brush and the second rotating brush such that the rotating shafts of the first rotating brush and the second rotating brush are located on the same line. Therefore, even if brush members having different textures from each other are attached to the outer surface of the main body, the rotary brush can be quickly manufactured.

A vacuum cleaner according to an embodiment of the present invention may include a body and a suction nozzle.

The body may create a pressure differential of air. An air blower may be provided inside the body.

The suction nozzle may suck dust on the floor using the pressure difference of the air.

The suction nozzle may include a housing and a rotating brush.

The housing may form an inlet for moving dust toward the body.

The housing may be provided with a driving portion.

The rotating brush may sweep dust on the ground toward the inlet side by rotating.

The rotating brush may include the first rotating brush, the second rotating brush, and the coupler.

The drive section may transmit a rotational motion to the first rotating brush.

The driving part may include a motor and a transmission.

The motor may generate a rotational force. The motor may be provided as a BLDC motor. The transmission may transmit a rotational motion of the motor to the first rotating brush.

The second rotating brush may be rotatably mounted to the housing.

In another aspect, the first rotating brush may include a first body having a cylindrical shape and a first brush member.

The first body may be radially formed with a first through hole.

The first brush member may be affixed to an outer surface of the first body.

The second rotating brush may include a second body having a cylindrical shape and a second brush member.

The second body may be radially formed with a second through hole.

The second brush member may be attached to an outer surface of the second body.

The first and second brush members may include a plurality of hairs, respectively. The plurality of hairs are elastically bent and deformed by the ground to sweep the dust toward the inlet side.

The outer surface of the coupler body may be in circumferential contact with the inner surface of the second body.

The coupler may include a coupler body, a first engaging portion, a first bent and deformed portion, a second engaging portion, and a second bent and deformed portion.

The outer surface of the coupler body may be in circumferential contact with the inner surface of the first body.

The first engaging portion may be inserted into the first through hole.

The first bent and deformed portion may connect the coupling main body and the first engaging portion.

The first bending deformation portion may be bent and deformed in a radial direction of the coupling main body.

The second engaging portion may be inserted into the second through hole.

The second bent and deformed portion may connect the coupling main body and the second engaging portion.

The second bending deformation portion may be bent and deformed in a radial direction of the coupling main body.

The protrusion may be formed on an inner surface of the first body in a direction of a rotation shaft of the rotary brush. The insertion groove may be formed in an outer surface of the coupling body in a direction of a rotation shaft of the rotary brush.

The protrusion may move along the insertion groove until the first engaging portion is inserted into the first through hole.

The protruding portion and the insertion groove may guide the first engaging portion to the first through hole. The projection and the insertion groove may prevent relative rotation of the coupler body and the first body.

The protrusion may be formed on an inner surface of the second body in a direction of a rotation shaft of the rotary brush. The insertion groove may be formed in an outer surface of the coupling body in a direction of a rotation shaft of the rotary brush.

The protruding portion may move along the insertion groove until the second engaging portion is inserted into the second through hole.

The protruding portion and the insertion groove may guide the second engaging portion to the second through hole. The projection and the insertion groove may prevent relative rotation of the coupler body and the second body.

If the first engaging portion is inserted into the first through hole, relative movement and rotation of the coupler body and the first body may be prevented. If the second engaging portion is inserted into the second through hole, relative movement and rotation of the coupler body and the second body may be prevented.

The first body and the second body may contact each other in a rotation axis direction of the rotary brush to form a contact surface if the second engaging portion is inserted into the second through hole. Thus, the first brush member and the second brush member may be disposed on the outer surface of the rotating brush without being spaced apart from or overlapping with each other.

An adhesive layer may be disposed between the inner surface of the first body, the inner surface of the second body, and the outer surface of the coupler body. The adhesive layer may improve a coupling force of the first body and the coupling body and a coupling force of the second body and the coupling body.

The lines of the plurality of hairs may be spiral around the rotation axis.

The grains of the plurality of hairs may be symmetrical to each other with the contact surface as a reference.

The grains of the plurality of hairs may be inclined toward the contact surface. At this time, the grain of the plurality of hairs may be inclined toward the opposite side to the rotation direction of the rotary brush.

The plurality of bristles of the first and second rotating brushes are separated from the ground and elastically restored in the process to an original state. At this time, the foreign matter in contact with the plurality of hairs is swept toward the contact surface and the entrance side by the kinetic energy and elastic restoring force of the plurality of hairs.

Therefore, the foreign substances such as hair, dust, etc. attached to the rotating brush may not move toward the distal end of the rotating brush and be sandwiched or gathered at a specific portion.

Effects of the invention

According to the embodiment of the present invention, the coupling couples the first rotating brush and the second rotating brush such that the rotating shafts of the first rotating brush and the second rotating brush are positioned on the same line, and thus, after the brush members are respectively attached to the outer surfaces of the separated bodies, the separated bodies are coupled by the coupling, and thus, it is possible to rapidly manufacture the rotating brushes having the lines of the plurality of hairs symmetrical with respect to the contact surface of the first rotating brush and the second rotating brush.

According to the embodiment of the present invention, the first brush member is attached to the outer surface of the first body, the second brush member is attached to the outer surface of the second body, and the first body and the second body are coupled in contact with each other in the rotation axis direction, whereby the first brush member and the second brush member can be closely attached to the contact surfaces of the first rotating brush and the second rotating brush on the same plane without a gap.

According to the embodiment of the present invention, the plurality of hairs are formed in a spiral shape around the rotation axis, are symmetrical with each other with respect to the contact surface, and are inclined with respect to the contact surface and the opposite side of the rotation direction of the rotary brush, whereby the foreign substances such as hair and dust attached to the rotary brush are moved to the front side of the inlet and sucked into the inlet, or easily removed by the user.

Drawings

Fig. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.

Fig. 2 is a perspective view of the suction nozzle of the vacuum cleaner of fig. 1, viewed from above.

Fig. 3 is a perspective view of the suction nozzle of the vacuum cleaner of fig. 1, viewed from below.

Fig. 4 is an exploded perspective view of the suction nozzle of fig. 2.

FIG. 5 is a cross-sectional view of the suction nozzle of FIG. 2.

Fig. 6 is a perspective view illustrating a state in which the brush module is separated from the suction nozzle of fig. 2.

Fig. 7 is a perspective view illustrating the brush module of fig. 6.

Fig. 8 is an exploded perspective view of the brush module of fig. 7.

Fig. 9 is a perspective view illustrating a separated state of the first and second rotating brushes of fig. 8.

Fig. 10 is a perspective view illustrating a separated state of the second rotating brush and the coupling of fig. 9.

Fig. 11 is a perspective view illustrating a separated state of the first body and the first brush member, and the second body and the second brush member of fig. 10.

Fig. 12 is a perspective view of the rotary brush of fig. 8.

FIG. 13 is a front view of the suction nozzle of FIG. 2.

Fig. 14 is a schematic view showing a use state of the suction nozzle of fig. 2.

Fig. 15 is a schematic view illustrating a state in which bristles of the rotating brush of fig. 14 are bent and deformed according to the ground.

Fig. 16 is a schematic view illustrating a state in which the bristles of the rotating brush of fig. 15 push back impurities on the ground.

Fig. 17 is a schematic view illustrating a state in which foreign substances of the floor of fig. 16 are moved backward by the bristles of the rotary brush.

Fig. 18 is a bottom view illustrating a rotary brush of the suction nozzle of fig. 2.

Description of the reference numerals

1: vacuum cleaner with a vacuum cleaner head

20: body

21: handle bar

22: dust barrel

30: extension tube, 300: brush module

10: suction nozzle, 310: rotary brush

100: housing, 311: first rotary brush

101: suction space, 311A: first main body

110: body case, 311H: a first through hole

111: inlet, 310F: contact surface

120: lower case, 311B: first brush member

121: first lower case, 310R: hair with bristles

122: second lower case, 312: second rotary brush

130: mounting case, 312A: second body

131: cover, 312H: second through hole

140: support case, 311P, 312P: projection part

141: push button, 312B: second brush member

150: side cover, 310R: hair with bristles

W1: first wheel, 313: coupling device

W2: second wheel, 313A: connector body

200: drive unit, 313H: insertion groove

210: bracket, 310B: adhesive layer

220: motor, 313B: a first engaging part

230: transmission, 313C: second engaging part

231: first shaft member, 313D: first bending deformation part

400: connector, 313E: second bending deformation part

401: path, 314: second shaft member

410: insertion portion, 315: third shaft member

420: first connection portion, 314H, 315H: insertion groove

430: second connection portion, 320: assembling and disassembling cover

431: assembling and disassembling button

440: joining part

450: telescopic tube

451: telescopic hose

452: spiral spring

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in explaining the present invention, descriptions of well-known functions or constructions will be omitted in order to clarify the gist of the present invention.

Fig. 1 is a perspective view of a vacuum cleaner 1 according to an embodiment of the present invention.

As shown in fig. 1, a vacuum cleaner 1 according to an embodiment of the present invention includes a body 20 and a suction nozzle 10.

The suction nozzle 10 is connected to the body 20 through an extension pipe 30. The mouthpiece 10 may also be connected directly to the body 20. The user can move the suction nozzle 10 placed on the floor back and forth in a state of grasping the handle 21 formed on the body 20.

The body 20 is a structure that forms a pressure difference of air. A blower is provided inside the main body 20. When the blower forms a pressure difference of air, dust and foreign substances on the floor are moved toward the body 20 through the inlet 111 of the suction nozzle 10 and the extension pipe 30.

A centrifugal separation type dust collecting apparatus may be disposed inside the body 20. Dust and foreign substances may be contained in the dust bucket 22.

Fig. 2 is a perspective view of the suction nozzle 10 of the vacuum cleaner 1 of fig. 1, viewed from above. Fig. 3 is a perspective view of the suction nozzle 10 of the vacuum cleaner 1 of fig. 1 as seen from below. Fig. 4 is an exploded perspective view of the suction nozzle 10 of fig. 2.

The suction nozzle 10 is a structure for sucking dust on the floor surface using a pressure difference of air. The suction nozzle 10 includes a housing 100, a driving part 200, a brush module 300, and a connector 400.

The main technical feature of the present invention is the rotating brush 310 of the brush module 300. Therefore, the housing 100, the driving part 200, and the connector 400 will be schematically described.

Hereinafter, for convenience of understanding of the present invention, the side of the rotary brush 310 is referred to as the front and front sides of the suction nozzle 10, and the side of the connector 400 is referred to as the rear and rear sides of the suction nozzle 10.

Fig. 1 to 3 show a three-dimensional rectangular coordinate system. The directions indicated by the X-axis of the three-dimensional rectangular coordinate system are the front and the front side described above. The direction indicated by the Y axis of the three-dimensional rectangular coordinate system is a direction parallel to the rotation axis of the rotating brush. The direction of the Z-axis of the three-dimensional rectangular coordinate system is upward.

The assembly sequence of the mouthpiece 10 is as follows. First, the connector 400 is assembled. Next, the connector 400 is assembled with the mounting housing 130. The mounting housing 130 is rotatably mounted to the connector 400. Thereafter, the driving part 200 is coupled to one side surface of the body case 110.

Then, the mounting case 130 is coupled to the upper portion of the body case 110. Next, the lower case 120 is coupled to the lower portion of the body case 110. Next, the support case 140 is coupled to the lower portion of the body case 110. Next, the push button 141 is mounted to the support case 140. Then, the side cover 150 is coupled to one side of the body case 110.

Finally, the first shaft member 231 is inserted into the second shaft member 314 of the rotary brush 310, and the detachable cover 320 is detachably coupled to the other side surface of the main body case 110. Thereby, the assembly of the suction nozzle 10 is completed.

FIG. 5 is a cross-sectional view of the suction nozzle 10 of FIG. 2.

As shown in fig. 4 and 5, the housing 100 is a structure of a passage 401 that guides dust and foreign substances on the floor to the connector 400.

The case 100 includes a body case 110, a lower case 120, a mounting case 130, and a support case 140.

The body case 110 forms an inlet 111 for moving dust toward the body 20. An inlet 111 is formed at the rear side of the body housing 110. The inlet 111 is formed in a cylindrical shape. A rotary brush 310 is mounted on the front side of the body case 110.

The rotating brush 310 is rotated by the driving part 200. The rotating brush 310 scrapes dust and foreign substances on the floor and pushes it backward. Dust and foreign substances swept toward the rear side of the rotating brush 310 may easily enter the inlet 111. The body case 110 covers the upper portion of the floor between the rotary brush 310 and the inlet 111.

Between the rotary brush 310 and the inlet 111, a space (hereinafter, "suction space 101") is formed between the housing 100 and the floor. The suction space 101 is isolated from the outside except for a gap between the casing 100 and the floor. Dust and foreign substances sucked into the space 101 enter the passage 401 via the inlet 111.

As shown in fig. 4 and 5, the lower housing 120 forms the suction space 101 together with the body housing 110.

The lower case 120 includes a first lower case 121 and a second lower case 122. The first lower case 121 and the second lower case 122 form a wall surface between the rotary brush 310 and the inlet 111, which guides dust and foreign substances of the suction space 101 to the inlet 111 side. A pair of first wheels W1 are mounted on the second lower case 122.

The mounting housing 130 is rotatably combined with the connector 400. The cover 131 of the mounting case 130 is mounted on the upper portion of the body case 110.

The support housing 140 supports the suction nozzle 10 and a lower portion of the connector 400. A second wheel W2 is mounted to the support housing 140. The second wheel W2 rotates together with the pair of first wheels W1 and rolls on the ground.

The connector 400 is a structure that enables the body 20 and the mouthpiece 10 to rotate relative to each other. The connector 400 has a passage 401 formed therein for moving dust toward the body 20.

The connector 400 includes an insertion portion 410, a first connection portion 420, a second connection portion 430, a coupling portion 440, and a telescopic tube 450.

If the cover part 131 is mounted on the upper portion of the body case 110, the insertion part 410 is inserted inside the inlet 111.

Coupling portion 440 rotatably couples mounting housing 130 and connector 400 about insertion portion 410.

The first connection portion 420 and the second connection portion 430 are respectively in a pipe shape. The first connection part 420 and the second connection part 430 are rotatably combined.

An attachment/detachment button 431 is formed on the second connection portion 430. The attachment/detachment button 431 is connected to the engagement portion 432. The movement of the extension pipe 30 is prevented by the engaging portion 432.

As shown in fig. 5, the bellows 450 forms a passageway 401 between the inlet 111 and the second connection 430. The bellows 450 includes a bellows hose 451 and a coil spring 452.

The flexible hose 451 has a passage 401 formed therein. The flexible hose 451 has a cylindrical shape. The flexible hose 451 is made of a soft resin.

Therefore, the extension hose 451 is elastically deformed at the time of the relative rotation of the first connection part 420 and the second connection part 430 and the relative rotation of the mounting case 130 and the first connection part 420.

The coil spring 452 is attached to the inner surface or the outer surface of the extension hose 451. The coil spring 452 keeps the extension hose 451 in a cylindrical shape.

As shown in fig. 4 and 5, the driving unit 200 rotates the rotary brush 310. The driving part 200 is coupled to one side surface (hereinafter, "left side surface") of the body case 110.

The side cover 150 covers the driving part 200. The side cover 150 is coupled to the left side of the housing 100 by a fastening structure such as a hook. The side cover 150 is formed with a hole through which air enters and exits.

The driving part 200 includes a bracket 210, a motor 220, and a transmission 230.

The bracket 210 is coupled to the body case 110 by bolts. The motor 220 is a structure that generates a rotational force. The motor 220 may be provided as a BLDC motor (Brushless dc motor). The motor 220 is coupled to the bracket 210.

The transmission 230 is a structure that transmits the rotational motion of the motor 220 to the rotating brush 310. The actuator 230 is mounted to the bracket 210. The transmission 230 may be provided as a belt transmission.

As shown in fig. 4, the first shaft member 231 is a structure that transmits the rotational motion of the belt transmission to the rotating brush 310. A second shaft member 314 is provided on one side of the rotating brush 310 in the rotating shaft direction.

The first shaft member 231 and the second shaft member 314 form a plurality of surfaces that engage with each other. If the first shaft member 231 and the second shaft member 314 are engaged with each other, the rotation axis of the first shaft member 231 and the rotation axis of the second shaft member 314 will be located on the same line.

The rotational force of the first shaft member 231 is transmitted to the second shaft member 314 through the contact surface. In a state where the first shaft member 231 and the second shaft member 314 are engaged, the rotation axis of the rotary brush 310 is positioned on the same line as the rotation axis of the first shaft member 231.

Fig. 6 is a perspective view illustrating a state in which the brush module 300 is separated from the suction nozzle 10 of fig. 2. Fig. 7 is a perspective view illustrating the brush module 300 of fig. 6. Fig. 8 is an exploded perspective view of the brush module 300 of fig. 7.

As shown in fig. 6 and 7, the brush module 300 includes a rotating brush 310 and a detachable cover 320.

Fig. 9 is a perspective view illustrating a separated state of first rotating brush 311 and second rotating brush 312 of fig. 8. Fig. 10 is a perspective view illustrating a separated state of the second rotating brush 312 and the coupling 313 of fig. 9.

As shown in fig. 9 and 10, the rotating brush 310 scrapes dust and foreign substances on the floor and pushes backward. Rotating brush 310 includes a first rotating brush 311, a second rotating brush 312, and a coupling 313.

As shown in fig. 8 and 9, the first rotating brush 311 receives a rotating motion from the driving part 200. The first rotating brush 311 includes a first body 311A, a first brush member 311B, and a second shaft member 313.

The first body 311A forms a skeleton of the first rotating brush 311. The first body 311A has a cylindrical shape with a hollow interior. The first body 311A is formed with a first through hole 311H in the radial direction.

The central axis of the first body 311A serves as the central axis of the first rotating brush 311. The central axis of the first body 311A is parallel to the Y-axis direction. The first body 311A forms a uniform moment of inertia (rotational inertia) in the circumferential direction. The first body 311A may be made of an aluminum material.

The first brush member 311B is attached to an outer surface of the first body 311A. The first brush member 311B includes a plurality of bristles. The plurality of hairs scrape dust and foreign substances on the ground while the first body 311A rotates. The plurality of hairs may include fiber hairs and metal hairs.

The fiber hairs and the metal hairs may be directly attached to the outer surface of the first body 311A. Although not shown, a fiber layer may be attached to the outer surface of the first body 311A. The fiber wool and the metal wool can be attached to the fiber layer.

The fiber wool may be made of a synthetic resin material such as nylon. The metal wool is produced by containing a conductive substance. The metal wool can be produced by coating a conductive material on synthetic resin wool.

Static electricity generated from the fiber hairs can be discharged or removed to the ground through the metal hairs. Therefore, a phenomenon that static electricity is transferred to a user can be suppressed.

The second shaft member 313 is a structure that receives the rotational movement of the first shaft member 231. The second shaft member 313 is disposed in one side opening of the first body 311A. The second shaft member 313 is inserted into one side opening of the first body 311A.

An insertion groove 313H is formed in the Y-axis direction on the outer surface of the second shaft member 313. A protrusion 311P is formed on an inner surface of the first body 311A in the Y-axis direction. When the second shaft member 313 is inserted into the opening of the first body 311A, the projection 311P is inserted into the insertion groove 313H. The projection 311P prevents relative rotation of the second shaft member 313.

The second shaft member 313 is formed with a space for insertion of the first shaft member 231. If the rotating brush 310 moves in the Y-axis direction, the first shaft member 231 is inserted into the second shaft member 313.

The first shaft member 231 and the second shaft member 313 form a plurality of surfaces that engage each other. If the first and second

axial members

231, 313 were to engage each other, the rotational axis of the first axial member 231 and the rotational axis of the second axial member 313 would be on the same line.

The rotational force of the first shaft member 231 is transmitted to the second shaft member 313 through the contact surface. In the state of engagement of the first shaft member 231 and the second shaft member 313, the rotation axis of the rotary brush 310 is positioned on the same line as the rotation axis of the first shaft member 231.

As shown in fig. 8 and 9, the second rotating brush 312 is rotatably attached to the housing 100 by a detachable cover 320. The detachable cover 320 and the housing 100 may be detachably coupled by a snap-fit structure. Alternatively, the detachable cover 320 and the housing 100 may be coupled by bolts.

The second rotating brush 312 includes a second body 312A, a second brush member 312B, and a third shaft member 314.

The second body 312A forms a skeleton of the second rotating brush 312. The second body 312A has a cylindrical shape with a hollow interior. The second body 312A forms a second through hole 312H in the radial direction.

The central axis of the second body 312A serves as the central axis of the second rotating brush 312. The central axis of the second body 312A is parallel to the Y-axis direction. The second body 312A forms a uniform moment of inertia in the circumferential direction. The second body 312A may be made of aluminum.

The second brush member 312B is attached to the outer surface of the second body 312A. The second brush member 312B includes a plurality of bristles. The plurality of hairs scrape dust and foreign substances on the ground while the second body 312A rotates. The plurality of hairs may include fiber hairs and metal hairs.

The fiber hairs and the metal hairs may be directly attached to the outer surface of the second body 312A. Although not shown, a fiber layer may be attached to the outer surface of the second body 312A. The fiber wool and the metal wool can be attached to the fiber layer.

The fiber wool may be made of synthetic resin such as nylon. The metal wool is produced by containing a conductive substance. The metal wool can be produced by coating a conductive material on synthetic resin wool.

The third shaft member 314 is a structure that rotatably connects the second body 312A to the detachable lid 320. The third shaft member 314 is disposed in one side opening of the second body 312A. The third shaft member 314 is inserted into one side opening of the second body 312A.

An insertion groove 313H is formed in the outer surface of the third shaft member 314 along the Y-axis direction. A protrusion 312P is formed on an inner surface of the second body 312A in the Y-axis direction. When the third shaft member 314 is inserted into the opening of the second body 312A, the projection 312P is inserted into the insertion groove 313H. The projection 312P prevents relative rotation of the third shaft member 314.

A bearing B is mounted on the third shaft member 314. The detachable cover 320 is provided with a fixed shaft a. The bearing B rotatably supports the fixed shaft a. A groove is formed in the fixed shaft a. A snap ring S is installed in the groove to prevent the separation of the fixed shaft a from the third shaft member 314.

Coupling 313 couples first rotating brush 311 to second rotating brush 312. When coupling 313 couples first rotating brush 311 with second rotating brush 312, the rotation shafts of first rotating brush 311 and second rotating brush 312 are located on the same line.

Fig. 11 is a perspective view illustrating a separated state of the first body 311A and the first brush member 311B and the second body 312A and the second brush member 312B of fig. 10. Fig. 12 is a perspective view of the rotary brush 310 of fig. 8.

As shown in fig. 11 and 12, the coupling 313 includes a coupling main body 313A, a first engagement portion 313B, a first bending deformation portion 313D, a second engagement portion 313C, and a second bending deformation portion 313E.

The outer surface of the coupling main body 313A is in circumferential contact with the inner surfaces of the first and second

main bodies

311A and 312A. The coupling body 313A has a cylindrical shape with a hollow interior. The center axis of the coupling main body 313A is parallel to the center axis direction of the first main body 311A and the second main body 312A. The coupling body 313A may be made of a synthetic resin material.

A portion of the coupling main body 313A in the Y-axis direction with respect to the middle (hereinafter, "first main body portion") is in contact with the inner surface of the first main body 311A in the circumferential direction. Further, a portion in the-Y axis direction with respect to the middle of the coupling main body 313A (hereinafter, "second main body portion") is in contact with the inner surface of the second main body 312A in the circumferential direction.

The first engaging portion 313B is inserted into the first through hole 311H. The first engaging portion 313B is formed in the first body portion. The first engaging portion 313B projects in the radial direction with reference to the outer surface of the first body portion.

The first bending deformation portion 313D is a structure connecting the coupling main body 313A and the first engagement portion 313B. The first bending deformation portion 313D is formed in the first body portion. The first bending deformation portion 313D connects the coupling main body 313A and the first engagement portion 313B in the Y-axis direction.

The outer surface of the first curved deformation portion 313D forms the same curvature as the outer surface of the coupling main body 313A. Therefore, if the first engaging portion 313B is inserted into the first through hole 311H, the outer surface of the first bending deformation portion 313D contacts the inner surface of the first body 311A in the circumferential direction.

As described above, the protrusion 311A is formed on the inner surface of the first body 311A in the Y-axis direction. An insertion groove 313H is formed in the Y-axis direction on the outer surface of the coupling main body 313A.

When the first main body portion is inserted into the opening in the-Y axis direction of the first main body 311A, the projecting portion 311A is inserted into the insertion groove 313H. Until the first engaging portion 313B is inserted into the first through hole 311H, the projecting portion 311A moves along the insertion groove 313H.

That is, the protrusion 311A and the insertion groove 313H guide the first engagement portion 313B to the first through hole 311H. In addition, the projection 311A and the insertion groove 313H prevent relative rotation of the coupling main body 313A and the first main body 311A.

When the first body portion is inserted into the opening of the first body portion 311A in the-Y axis direction, the first engaging portion 313B is locked to the opening peripheral edge of the first body portion. The assembler presses the first engaging portion 313B in the center axis direction of the coupling body 313A and inserts the first body portion into the opening in the-Y axis direction of the first body 311A.

The first bending deformation portion 313D is kept in a state of being bent and deformed in the central axis direction of the coupling main body 313A until the first engagement portion 313B is inserted into the first through hole 311H.

When the first engagement portion 313B is elastically restored by the first bending deformation portion 313D and inserted into the first through hole 311H, the outer surface of the first bending deformation portion 313D contacts the inner surface of the coupling main body 313A in the circumferential direction.

If the first engaging portion 313B is inserted into the first through hole 311H, the relative movement and rotation of the coupling main body 313A and the first main body 311A are prevented.

An adhesive is applied to predetermined regions in the Y-axis and-Y-axis directions with respect to the middle of the outer surface of the coupling main body 313A. The dotted line shown on the outer surface of the coupling main body 313A refers to a region where the adhesive is applied with reference to the middle of the coupling main body 313A.

If the first body portion is inserted into the opening in the-Y axis direction of the first body 311A, an adhesive layer is provided between the inner surface of the first body 311A and the outer surface of the coupling body 313A. The adhesive layer improves the coupling force of the first body 311A and the coupling body 313A.

The second engaging portion 313C is inserted into the second through hole 312H. The second engaging portion 313C is formed in the second body portion. The second engaging portion 313C protrudes in the radial direction with reference to the outer surface of the second body portion.

The second bending deformation portion 313E is a structure connecting the coupling main body 313A and the second engagement portion 313C. The second bending deformation portion 313E is formed in the second body portion. The second bent and deformed portion 313E connects the coupling main body 313A and the second engaging portion 313C in the-Y axis direction.

The outer surface of the second curved deforming part 313E forms the same curvature as the outer surface of the coupling main body 313A. Therefore, if the second engaging portion 313C is inserted into the second through hole 312H, the outer surface of the second bending deformation portion 313E contacts the inner surface of the second body 312A in the circumferential direction.

As described above, the projection 312P is formed on the inner surface of the second body 312A in the Y-axis direction. An insertion groove 313H is formed in the Y-axis direction on the outer surface of the coupling main body 313A.

When the second body portion is inserted into the opening of the second body 312A in the Y-axis direction, the projection portion 312P is inserted into the insertion groove 313H. Until the second engaging portion 313C is inserted into the second through hole 312H, the projecting portion 312P moves along the insertion groove 313H.

That is, the protruding portion 312P and the insertion groove 313H guide the second engagement portion 313C to the second through hole 312H. In addition, the projection 312P and the insertion groove 313H prevent relative rotation of the coupling main body 313A and the second main body 312A.

When the second body portion is inserted into the opening of the second body 312A in the Y-axis direction, the second engagement portion 313C is locked to the opening peripheral edge of the second body portion. The assembler presses the second engaging portion 313C in the center axis direction of the coupling body 313A and inserts the second body portion into the opening in the Y axis direction of the second body 312A.

Until the second engagement portion 313C is inserted into the second through hole 312H, the second bending deformation portion 313E is kept in a state of being bent and deformed in the central axis direction of the coupling main body 313A.

If the second engaging portion 313C is inserted into the second through hole 312H as the second bending deformation portion 313E elastically returns, the outer surface of the second bending deformation portion 313E contacts the inner surface of the coupling main body 313A in the circumferential direction.

If the second engaging portion 313C is inserted into the second through hole 312H, the relative movement and rotation of the coupling main body 313A and the second main body 312A are prevented. When the second engaging portion 313C is inserted into the second through hole 312H, the first body 311A and the second body 312A contact each other in the rotation axis direction of the brush member to form a contact surface (hereinafter, "reference surface").

An adhesive is applied to predetermined regions in the Y-axis and-Y-axis directions with respect to the middle of the outer surface of the coupling main body 313A. If the second body portion is inserted into the opening in the Y-axis direction of the second body 312A, an adhesive layer is provided between the inner surface of the second body 312A and the outer surface of the coupling body 313A. The adhesive layer improves the coupling force of the second body 312A and the coupling body 313A.

Fig. 13 is a front view of the suction nozzle 10 of fig. 2. Fig. 18 is a bottom view illustrating the rotary brush 310 of the suction nozzle 10 of fig. 2. The dotted line of fig. 18 indicates the grain direction of the plurality of hairs. The plurality of hairs lie down in the direction of the dotted arrow.

The suction nozzle 10 moves forward and backward and sucks foreign substances such as hair, dust, etc. on the floor. At this time, the rotary brush 310 rotates and sweeps foreign substances such as hairs, dust, etc. on the ground toward the rear side, i.e., the entrance side.

Fig. 14 is a schematic view showing a use state of the suction nozzle 10 of fig. 2. Fig. 15 is a schematic view showing a state in which the bristles 310R of the rotary brush 310 of fig. 14 are bent and deformed by contact with the ground.

As shown in fig. 14, the bristles 310R of the rotating brush 310 are formed in a pattern inclined to the opposite side of the rotation direction of the rotating brush 310. As shown in fig. 15, the bristles 310R of the rotating brush 310 are bent and deformed while contacting the ground, and are inclined further toward the opposite side to the rotating direction of the rotating brush 310.

Fig. 16 is a schematic view illustrating a state in which the bristles 310R of the rotating brush 310 of fig. 15 push back foreign substances on the ground. Fig. 17 is a schematic view illustrating a state where foreign substances on the floor of fig. 16 are moved backward by the bristles 310R of the rotary brush 310.

As shown in fig. 16, the bristles 310R of the rotating brush 310 push back impurities such as hairs and dust on the floor in a bent and deformed state. As shown in fig. 17, the bristles 310R of the rotary brush 310 are separated from the ground and elastically restored, thereby restoring the original state.

At this time, the foreign substances in contact with the bristles 310R are swept toward the rear side of the rotating brush 310 by the kinetic energy and elastic restoring force of the bristles 310R. That is, the bristles 310R of the first and second

rotating brushes

311 and 312 are elastically bent and deformed by the ground and sweep dust toward the inlet side.

Fig. 18 should be understood as a view from the perspective of viewing the rotating brush 310 rubbing against the upper surface of the floor from below the transparent floor. P of fig. 18 refers to the point where the hair 310R is implanted.

As shown in fig. 18, the lines of the bristles 310R of the first and second

rotating brushes

311 and 312 are spiral around the rotation axis of the rotating brush 310. In addition, the textures of the bristles 310R of the first and second

rotating brushes

311 and 312 are symmetrical with each other with reference to the reference surface.

The bristles 310R of the second rotating brush 312 of the first rotating brush 311 have a pattern inclined toward the reference surface. The bristles 310R of the first rotating brush 311 and the second rotating brush 312 have a pattern inclined toward the opposite side of the rotation direction of the rotating brush 310.

As shown in the enlarged view of the upper part of fig. 18, the bristles 310R of the first rotating brush 311 and the second rotating brush 312, which are in contact with the ground, are bent and deformed in the direction opposite to the moving direction, i.e., in the X-axis direction, by the frictional force with the ground.

As shown in the lower enlarged view of fig. 18, the bristles 310R of the first and second

rotating brushes

311 and 312 are separated from the ground and elastically restored, thereby restoring the original state. At this time, the foreign matter in contact with the hairs 310R is swept toward the reference plane and the-X-axis direction by the kinetic energy and elastic restoring force of the hairs 310R.

That is, the bristles 310R of the first and second

rotating brushes

311 and 312 are elastically bent and deformed by the ground and sweep dust toward the inlet side. In addition, impurities such as hair and dust adhering to first rotating brush 311 and second rotating brush 312 move to the reference surface. The user can easily remove foreign substances such as hair, dust, etc. attached to the middle of the rotary brush 310.

While the present invention has been described and illustrated with reference to the specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope thereof. Therefore, these modifications or variations should not be understood independently of the technical idea or viewpoint of the present invention, and the modified embodiments should be regarded as falling within the scope of claims of the present invention.

Industrial applicability

According to the vacuum cleaner of the present invention, the coupling couples the first rotating brush and the second rotating brush such that the rotation axes of the first rotating brush and the second rotating brush are positioned on the same line, and thus, if the separated body is coupled by the coupling after the brush members are respectively attached to the outer surfaces of the separated body, it is possible to rapidly manufacture the rotating brush in which the lines of the plurality of hairs are symmetrical with respect to the contact surfaces of the first rotating brush and the second rotating brush, and since the limitation of the related art is exceeded in this respect, not only is there a possibility of marketing or marketing of a sufficient application device except for use in the related art, but also to the extent that it can be clearly implemented in reality, it is an invention having industrial applicability.

Claims

1. A vacuum cleaner, in which,

the method comprises the following steps:

a body forming a pressure difference of air; and

a suction nozzle sucking dust on the floor using a pressure difference of the air,

the suction nozzle includes:

a housing forming an inlet for moving the dust to the body, and a driving part provided in the housing; and

a rotating brush which sweeps dust on the floor toward the inlet side by rotating,

the rotating brush includes:

a first rotating brush to which the driving part transmits a rotational motion;

a second rotating brush rotatably attached to the housing; and

a coupling the first rotating brush and the second rotating brush such that the rotation axes of the first and second rotating brushes are on the same line.

2. The vacuum cleaner of claim 1,

the first rotating brush and the second rotating brush respectively include:

a body having a cylindrical shape, in which a through hole is formed, the bodies of the first and second rotating brushes being in contact with each other in the direction of the rotation axis; and

a brush member attached to an outer surface of the body,

the coupler includes:

a coupling body having an outer surface in circumferential contact with an inner surface of the body;

a plurality of engaging portions inserted into the through holes, respectively; and

and a plurality of bending deformation portions that respectively connect the coupling main body and the plurality of engagement portions and are bent and deformed in a radial direction of the coupling main body.

3. The vacuum cleaner of claim 2,

protrusions are formed on inner surfaces of the bodies of the first and second rotating brushes in the direction of the rotation axis,

an insertion groove is formed on an outer surface of the coupling body in the direction of the rotation axis,

the protrusion moves along the insertion groove so that the engagement portion is inserted into the through hole.

4. The vacuum cleaner of claim 2,

an adhesive layer is disposed between the inner surfaces of the bodies of the first and second rotating brushes and the outer surface of the coupling body.

5. The vacuum cleaner of claim 1,

the first rotating brush includes:

a first body having a cylindrical shape and formed with a first through-hole in a radial direction; and

a first brush member attached to an outer surface of the first body,

the coupler includes:

a coupling body having an outer surface in circumferential contact with an inner surface of the first body;

a first engaging portion inserted into the first through hole; and

and a first bending deformation portion that connects the coupling main body and the first engagement portion and is bent and deformed in a radial direction of the coupling main body.

6. The vacuum cleaner of claim 5,

the second rotating brush includes:

a second body having a cylindrical shape and a second through hole formed in a radial direction; and

a second brush member attached to an outer surface of the second body,

an outer surface of the coupler body is in circumferential contact with an inner surface of the second body,

the coupler includes:

a second engaging portion inserted into the second through hole; and

and a second bending deformation portion that connects the coupling main body and the second engagement portion and is bent and deformed in a radial direction of the coupling main body.

7. The vacuum cleaner of claim 1,

the first and second rotating brushes each include:

a main body having a cylindrical shape, the main bodies of the first and second rotating brushes being in contact with each other in the rotation axis direction to form a contact surface; and

a brush member attached to an outer surface of the body,

the brush member includes a plurality of bristles elastically bent and deformed by the ground to sweep the dust toward the inlet side,

the lines of the plurality of hairs are spiral around the rotating shaft and are symmetrical with each other by taking the contact surface as a reference.

8. The vacuum cleaner of claim 7,

the plurality of bristles have a texture inclined toward the contact surface and inclined toward the opposite side to the rotation direction of the rotating brush.

9. A vacuum cleaner, in which,

the method comprises the following steps:

a body forming a pressure difference of air; and

the suction nozzle includes:

a housing forming an inlet through which the dust moves toward the body, a driving part being provided to the housing; and

the rotating brush includes:

a first rotating brush to which the driving part transmits a rotational motion; and

a second rotating brush coupled with the first rotating brush such that a rotation axis of the second rotating brush is on the same line as a rotation axis of the first rotating brush,

the first and second rotating brushes including a plurality of bristles elastically bent and deformed by the ground to sweep the dust toward the inlet side,

the lines of the plurality of hairs are spiral around the rotating shaft, and are symmetrical with each other with the contact surface of the first rotating brush and the second rotating brush as a reference.